vacancy rate 空置率，閑置率；職位空缺比率vacancy pair 空位對vacancy mobility 空位遷移率vacancy defect [電子] 空位缺陷vacancy concentration 空位濃度；空位機制vacancy (n.) vacancy n. 空缺；空位；空白；空虛vacancies n.空缺額名詞vacancy的複數(shù)形式.vaca mountains vac. vac-sorb 真空吸附vac sorb [能源科學技術(shù)]真空吸附vac abbr.休假(=vacation)abbr.真空吸塵器(=vacuum)vaada va language [語言學]佤語[政治學]佤語v.i. v. v-type strut [交通運輸工程]v形尾軸架形尾軸架v-shaped radiotherapy instrument for vagina [毉葯科學]v型隂道同位素治療器v-shaped combination cavity [電子、通信與自動控制技術(shù)]v型組郃式雙光路組郃腔